过马路前要左右看看，确保安全。

Look left and right to make sure it's safe before you go across the street.

youdao

过马路前，你必须左右看看。

Before you cross the street, you must look left and right.

youdao

他左右看看。向左。

He looked left and right.

youdao

So what we're going to look at is the expected payoff of Up versus, let me call it a : a being equally likely that my opponent chooses Left and Right.

所以接下来我们看看在我认为对手,选择左右的可能性相同下的预期收益,我们把它称为

耶鲁公开课 - 博弈论课程节选